38798c6d68
Update to LLVM 9 trunk Following the preparatory changes in #62474, this updates the LLVM submodule to https://github.com/rust-lang/llvm-project/tree/rustc/9.0-2019-07-12 and: * Changes the LLVM Rust bindings to account for the new SubtargetSubTypeKV. * Adjusts a codegen test for the new form of the byval attribute that takes a type. * Makes a PGO codegen test more liberal with regard to order and linkage. * Builds InstrProfilingPlatformWindows.c as part of libprofiler_builtins. * Moves registration of additional passes (in particular sanitizers) to the end of the module pass manager. * Disables LLDB on builders. r? @alexcrichton